A nut having a sleeve portion on its under side, which can be crimped or clinched to hold the item in place when inserted in a hole.
NSN 5975-01-301-1713
NSN 6220-00-107-9301
NSN 6105-01-395-8532
NSN 6620-01-207-0667
NSN 7035-01-460-5117
NSN 2925-01-389-6874
NSN 6620-00-021-9041
NSN 4140-00-846-4786
NSN 6145-00-911-9245
NSN 7035-01-426-4133
NSN 5905-00-880-5409
NSN 5895-01-249-2633